utils/sync_ports.py: Add sync_ports.py for local test.

Signed-off-by: zhanglinjing <Linjing.Zhang@infineon.com>

Author: LinjingZhang

utils/sync_ports.py

@@ -0,0 +1,53 @@
+import serial
+import sys
+
+JOB_START_TOKEN = "[@START_TEST@]"
+JOB_START_TOKEN_RESPONSE = JOB_START_TOKEN
+
+def send_start_token(port_list, baudrate=115200, timeout=2):
+    if not port_list:
+        print("No ports provided.")
+        return 1
+
+    print("\n\nINFO: Sending job start tokens ...")
+    return_code = 0
+
+    for port in port_list:
+        try:
+            ser = serial.Serial(port, baudrate=baudrate, timeout=timeout)
+            ser.reset_input_buffer()
+            ser.write((JOB_START_TOKEN + "\n").encode('utf-8'))
+            response = ser.readline().decode().strip()
+            print(f"INFO: [{port}] response : {response}")
+            count = 0
+
+            while (JOB_START_TOKEN_RESPONSE not in response) and (count < 300):
+                response = ser.readline().decode().strip()
+                print(f"INFO: [{port}] response : {response}")
+                count += 1
+
+            if JOB_START_TOKEN_RESPONSE not in response:
+                print(f"ERROR: Did not get proper response from job after sending job start token to port {port}. Expected was {JOB_START_TOKEN_RESPONSE}, received '{response}' !\n")
+                return_code = 1
+                ser.close()
+                break
+            ser.close()
+        except Exception as e:
+            print(f"ERROR: Exception for port {port}: {e}")
+            return_code = 1
+            break
+
+    return return_code
+
+if __name__ == "__main__":
+    """
+    Example usage:
+        python sync_ports.py /dev/ttyUSB0 /dev/ttyUSB1
+    This will send the JOB_START_TOKEN to each listed serial port and wait for the response.
+    """
+    ports = sys.argv[1:]
+    if not ports:
+        print("Usage: python sync_ports.py <port1> <port2> ...")
+        sys.exit(1)
+    ret = send_start_token(ports)
+    sys.exit(ret)